HP Forum Archive 16

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HP 48SX, how to open Message #1 Posted by Georg Lahm on 3 Aug 2006, 6:12 a.m. The "ON"-Key on my HP 48SX works only with very hard pressure. I intend to open the calculator, to look what is wrong. Does anyone know how to open it? Thanks Georg

Re: HP 48SX, how to open Message #2 Posted by Jeff O. on 3 Aug 2006, 7:29 a.m., in response to message #1 by Georg Lahm Check here for detailed instructions on how to get it open. The author promises to release repair guides for dead keys and other problems in the near future.

Re: HP 48SX, how to open Message #3 Posted by Han on 3 Aug 2006, 10:00 a.m., in response to message #2 by Jeff O. Click here for the repair guide.

Re: HP 48SX, how to open Message #4 Posted by Han on 3 Aug 2006, 10:03 a.m., in response to message #1 by Georg Lahm Quote: The "ON"-Key on my HP 48SX works only with very hard pressure. I intend to open the calculator, to look what is wrong. Does anyone know how to open it? Thanks Georg Your problem just might be a very dirty contact within the keyboard layer. That is, I suspect that opening the calculator may not do much for it as there are no other keyboard problems to indicate any problems with the keyboard connector with the PCB.

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